/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.zookeeper.test.system;

import java.io.IOException;

import org.apache.zookeeper.AsyncCallback;
import org.apache.zookeeper.CreateMode;
import org.apache.zookeeper.WatchedEvent;
import org.apache.zookeeper.Watcher;
import org.apache.zookeeper.ZooKeeper;
import org.apache.zookeeper.AsyncCallback.StatCallback;
import org.apache.zookeeper.AsyncCallback.StringCallback;
import org.apache.zookeeper.ZooDefs.Ids;
import org.apache.zookeeper.data.Stat;

/**
 * The client that gets spawned for the SimpleSysTest
 *
 */
public class SimpleClient implements Instance, Watcher, AsyncCallback.DataCallback, StringCallback, StatCallback {
	private static final long serialVersionUID = 1L;
	boolean createdEphemeral;
	byte data[];
	String hostPort;
	transient int index;
	transient String myPath;
	Reporter r;

	ZooKeeper zk;

	public void configure(String params) {
		String parts[] = params.split(" ");
		hostPort = parts[1];
		this.index = Integer.parseInt(parts[0]);
		myPath = "/simpleCase/" + index;
	}

	public void process(WatchedEvent event) {
		if (event.getPath() != null && event.getPath().equals("/simpleCase")) {
			zk.getData("/simpleCase", true, this, null);
		}
	}

	public void processResult(int rc, String path, Object ctx, byte[] data, Stat stat) {
		if (rc != 0) {
			zk.getData("/simpleCase", true, this, null);
		} else {
			this.data = data;
			String content = new String(data);
			if (content.equals("die")) {
				this.stop();
				return;
			}
			if (!createdEphemeral) {
				zk.create(myPath, data, Ids.OPEN_ACL_UNSAFE, CreateMode.EPHEMERAL, this, null);
				createdEphemeral = true;
			} else {
				zk.setData(myPath, data, -1, this, null);
			}
		}
	}

	public void processResult(int rc, String path, Object ctx, Stat stat) {
		if (rc != 0) {
			zk.setData(myPath, data, -1, this, null);
		}
	}

	public void processResult(int rc, String path, Object ctx, String name) {
		if (rc != 0) {
			zk.create(myPath, data, Ids.OPEN_ACL_UNSAFE, CreateMode.EPHEMERAL, this, null);
		}
	}

	public void setReporter(Reporter r) {
		this.r = r;
	}

	public void start() {
		try {
			zk = new ZooKeeper(hostPort, 15000, this);
			zk.getData("/simpleCase", true, this, null);
			r.report("Client " + index + " connecting to " + hostPort);
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	public void stop() {
		try {
			if (zk != null) {
				zk.close();
			}
		} catch (InterruptedException e) {
			e.printStackTrace();
		}
	}

	@Override
	public String toString() {
		return SimpleClient.class.getName() + "[" + index + "] using " + hostPort;
	}
}
